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Old 04-24-2012, 01:49 PM
41Sqn_Banks 41Sqn_Banks is offline
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Join Date: Oct 2007
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The reference graph seems to be based on N. 3171.

http://www.spitfireperformance.com/n3171.html
http://www.spitfireperformance.com/n3171speed.jpg
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